Stuff

#include <stdio.h>#include <stdlib.h>#include <string.h>char fill(char **first, char **second){   if (first)     *first = strdup("first");   if (second)     *second = strdup("second");}int main(void){   char *first, *second;   fill(&first, &second);   printf("%s %s\n", first, second);   return 0;}